Once the promoter region of a gene is activated, ________ unwinds the DNA of the downstream gene and begins the process of ________. What is the molecule generated by this process? How does the cell control the amount of this molecule released from the nucleus?
What will be an ideal response?
RNA polymerase, transcription
The RNA polymerase transcribes a single stranded mRNA. The cell can decrease mRNA by controlling the activity of the promoter with transcription factors if the gene is not constitutively expressed. Decreases in an inducer or increases in a repressor would reduce the amount of mRNA available for release. In addition, the amount of mRNA released is also affected by the availability of interfering RNA (siRNA or miRNA). Increases in interfering RNA that can inactivate or destroy mRNA would reduce the amount of mRNA released from the nucleus.
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A) active B) gated C) leak D) regulated E) local
Sperm undergo a process of conditioning known as __________ after they arrive in the female reproductive tract
Fill in the blank with correct word.
The posterior pituitary gland is also known as the ________.
Fill in the blank(s) with the appropriate word(s).
The normal pH of urine ________.
A. is always acidic B. is always alkaline C. is always neutral D. ranges from acidic to alkaline